Actual Problems in Machine Building 2015 No. 2

Актуальные проблемы в машиностроении. 2015. №2 Инновационные технологии в машиностроении ____________________________________________________________________ 157 13. Матвеев В.В. Размерный анализ технологических процессов / В.В. Матвеев, М.М. Тверской, Ф.И. Бойков и др. - М.: Машиностроение, 1982. – 264 с. DETERMINATION OF ROTARY SURFACES ALLOWANCE FOR PREFABRICATED GEOKHOD PARTS Walter A.V. , Ph.D. (Engineering), e-mail: avwalter@tpu.ru Lagunov S.E. , Student, e-mail: lagunov.1993@bk.ru Yurga Institute of Technology, TPU Affiliate, 26 Leningradskaya st., Yurga, 652055, Russian Federation Abstract The paper describes the sequence of manufacturing large-sized products of geokhod and the mechanism of forming allowances for machining ready-assembled bodies. The paper shows that the allowance value depends on the dimensions of the body component workpieces produced by thermal cutting. It is found that the most significant component of the allowance is the deviation of the shape and the location of the machined surface formed at the body assembly stage. The paper contains a calculation scheme and a few equations. The solution of these equations allows setting the amount of deviation and considering it as a part of the machining allowance. The paper contains the calculation of variances for the geokhod rotor product which is currently in pilot production. The expressions obtained show that the amount of displacement and structural dimensions of the workpiece surface are interrelated. Keywords Geokhod, large segmented-ring assemblies, assembly, geometric accuracy, tolerance, allowance